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|
/*
This file is part of TALER
Copyright (C) 2014-2023 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file pq/pq_query_helper.c
* @brief helper functions for Taler-specific libpq (PostGres) interactions
* @author Sree Harsha Totakura <sreeharsha@totakura.in>
* @author Florian Dold
* @author Christian Grothoff
*/
#include "platform.h"
#include <gnunet/gnunet_common.h>
#include <gnunet/gnunet_util_lib.h>
#include <gnunet/gnunet_pq_lib.h>
#include "taler_pq_lib.h"
#include "pq_common.h"
/**
* Function called to convert input amount into SQL parameter as tuple.
*
* @param cls closure
* @param data pointer to input argument, here a `struct TALER_Amount`
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_amount_currency_tuple (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
struct GNUNET_PQ_Context *db = cls;
const struct TALER_Amount *amount = data;
size_t sz;
GNUNET_assert (NULL != db);
GNUNET_assert (NULL != amount);
GNUNET_assert (1 == param_length);
GNUNET_assert (1 <= scratch_length);
GNUNET_assert (sizeof (struct TALER_Amount) == data_len);
GNUNET_static_assert (sizeof(uint32_t) == sizeof(Oid));
{
char *out;
Oid oid_v;
Oid oid_f;
Oid oid_c;
struct TALER_PQ_AmountCurrencyP d;
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db,
"int8",
&oid_v));
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db,
"int4",
&oid_f));
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db,
"varchar",
&oid_c));
sz = TALER_PQ_make_taler_pq_amount_currency_ (amount,
oid_v,
oid_f,
oid_c,
&d);
out = GNUNET_malloc (sz);
memcpy (out,
&d,
sz);
scratch[0] = out;
}
param_values[0] = scratch[0];
param_lengths[0] = sz;
param_formats[0] = 1;
return 1;
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_amount_with_currency (
const struct GNUNET_PQ_Context *db,
const struct TALER_Amount *amount)
{
struct GNUNET_PQ_QueryParam res = {
.conv_cls = (void *) db,
.conv = &qconv_amount_currency_tuple,
.data = amount,
.size = sizeof (*amount),
.num_params = 1,
};
return res;
}
/**
* Function called to convert input amount into SQL parameter as tuple.
*
* @param cls closure
* @param data pointer to input argument, here a `struct TALER_Amount`
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_amount_tuple (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
struct GNUNET_PQ_Context *db = cls;
const struct TALER_Amount *amount = data;
size_t sz;
GNUNET_assert (NULL != db);
GNUNET_assert (NULL != amount);
GNUNET_assert (1 == param_length);
GNUNET_assert (1 <= scratch_length);
GNUNET_assert (sizeof (struct TALER_Amount) == data_len);
GNUNET_static_assert (sizeof(uint32_t) == sizeof(Oid));
{
char *out;
Oid oid_v;
Oid oid_f;
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db,
"int8",
&oid_v));
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db,
"int4",
&oid_f));
{
struct TALER_PQ_AmountP d
= TALER_PQ_make_taler_pq_amount_ (amount,
oid_v,
oid_f);
sz = sizeof(d);
out = GNUNET_malloc (sz);
scratch[0] = out;
GNUNET_memcpy (out,
&d,
sizeof(d));
}
}
param_values[0] = scratch[0];
param_lengths[0] = sz;
param_formats[0] = 1;
return 1;
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_amount (
const struct GNUNET_PQ_Context *db,
const struct TALER_Amount *amount)
{
struct GNUNET_PQ_QueryParam res = {
.conv_cls = (void *) db,
.conv = &qconv_amount_tuple,
.data = amount,
.size = sizeof (*amount),
.num_params = 1,
};
return res;
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via #GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_denom_pub (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
const struct TALER_DenominationPublicKey *denom_pub = data;
const struct GNUNET_CRYPTO_BlindSignPublicKey *bsp = denom_pub->bsign_pub_key;
size_t tlen;
size_t len;
uint32_t be[2];
char *buf;
void *tbuf;
(void) cls;
(void) data_len;
GNUNET_assert (1 == param_length);
GNUNET_assert (scratch_length > 0);
GNUNET_break (NULL == cls);
be[0] = htonl ((uint32_t) bsp->cipher);
be[1] = htonl (denom_pub->age_mask.bits);
switch (bsp->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
tlen = GNUNET_CRYPTO_rsa_public_key_encode (
bsp->details.rsa_public_key,
&tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
tlen = sizeof (bsp->details.cs_public_key);
break;
default:
GNUNET_assert (0);
}
len = tlen + sizeof (be);
buf = GNUNET_malloc (len);
GNUNET_memcpy (buf,
be,
sizeof (be));
switch (bsp->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
GNUNET_memcpy (&buf[sizeof (be)],
tbuf,
tlen);
GNUNET_free (tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
GNUNET_memcpy (&buf[sizeof (be)],
&bsp->details.cs_public_key,
tlen);
break;
default:
GNUNET_assert (0);
}
scratch[0] = buf;
param_values[0] = (void *) buf;
param_lengths[0] = len;
param_formats[0] = 1;
return 1;
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_denom_pub (
const struct TALER_DenominationPublicKey *denom_pub)
{
struct GNUNET_PQ_QueryParam res = {
.conv = &qconv_denom_pub,
.data = denom_pub,
.num_params = 1
};
return res;
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via #GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_denom_sig (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
const struct TALER_DenominationSignature *denom_sig = data;
const struct GNUNET_CRYPTO_UnblindedSignature *ubs = denom_sig->unblinded_sig;
size_t tlen;
size_t len;
uint32_t be[2];
char *buf;
void *tbuf;
(void) cls;
(void) data_len;
GNUNET_assert (1 == param_length);
GNUNET_assert (scratch_length > 0);
GNUNET_break (NULL == cls);
be[0] = htonl ((uint32_t) ubs->cipher);
be[1] = htonl (0x00); /* magic marker: unblinded */
switch (ubs->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
tlen = GNUNET_CRYPTO_rsa_signature_encode (
ubs->details.rsa_signature,
&tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
tlen = sizeof (ubs->details.cs_signature);
break;
default:
GNUNET_assert (0);
}
len = tlen + sizeof (be);
buf = GNUNET_malloc (len);
GNUNET_memcpy (buf,
&be,
sizeof (be));
switch (ubs->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
GNUNET_memcpy (&buf[sizeof (be)],
tbuf,
tlen);
GNUNET_free (tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
GNUNET_memcpy (&buf[sizeof (be)],
&ubs->details.cs_signature,
tlen);
break;
default:
GNUNET_assert (0);
}
scratch[0] = buf;
param_values[0] = (void *) buf;
param_lengths[0] = len;
param_formats[0] = 1;
return 1;
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_denom_sig (
const struct TALER_DenominationSignature *denom_sig)
{
struct GNUNET_PQ_QueryParam res = {
.conv = &qconv_denom_sig,
.data = denom_sig,
.num_params = 1
};
return res;
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via #GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_blinded_denom_sig (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
const struct TALER_BlindedDenominationSignature *denom_sig = data;
const struct GNUNET_CRYPTO_BlindedSignature *bs = denom_sig->blinded_sig;
size_t tlen;
size_t len;
uint32_t be[2];
char *buf;
void *tbuf;
(void) cls;
(void) data_len;
GNUNET_assert (1 == param_length);
GNUNET_assert (scratch_length > 0);
GNUNET_break (NULL == cls);
be[0] = htonl ((uint32_t) bs->cipher);
be[1] = htonl (0x01); /* magic marker: blinded */
switch (bs->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
tlen = GNUNET_CRYPTO_rsa_signature_encode (
bs->details.blinded_rsa_signature,
&tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
tlen = sizeof (bs->details.blinded_cs_answer);
break;
default:
GNUNET_assert (0);
}
len = tlen + sizeof (be);
buf = GNUNET_malloc (len);
GNUNET_memcpy (buf,
&be,
sizeof (be));
switch (bs->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
GNUNET_memcpy (&buf[sizeof (be)],
tbuf,
tlen);
GNUNET_free (tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
GNUNET_memcpy (&buf[sizeof (be)],
&bs->details.blinded_cs_answer,
tlen);
break;
default:
GNUNET_assert (0);
}
scratch[0] = buf;
param_values[0] = (void *) buf;
param_lengths[0] = len;
param_formats[0] = 1;
return 1;
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_blinded_denom_sig (
const struct TALER_BlindedDenominationSignature *denom_sig)
{
struct GNUNET_PQ_QueryParam res = {
.conv = &qconv_blinded_denom_sig,
.data = denom_sig,
.num_params = 1
};
return res;
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via #GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_blinded_planchet (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
const struct TALER_BlindedPlanchet *bp = data;
const struct GNUNET_CRYPTO_BlindedMessage *bm = bp->blinded_message;
size_t tlen;
size_t len;
uint32_t be[2];
char *buf;
(void) cls;
(void) data_len;
GNUNET_assert (1 == param_length);
GNUNET_assert (scratch_length > 0);
GNUNET_break (NULL == cls);
be[0] = htonl ((uint32_t) bm->cipher);
be[1] = htonl (0x0100); /* magic marker: blinded */
switch (bm->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
tlen = bm->details.rsa_blinded_message.blinded_msg_size;
break;
case GNUNET_CRYPTO_BSA_CS:
tlen = sizeof (bm->details.cs_blinded_message);
break;
default:
GNUNET_assert (0);
}
len = tlen + sizeof (be);
buf = GNUNET_malloc (len);
GNUNET_memcpy (buf,
&be,
sizeof (be));
switch (bm->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
GNUNET_memcpy (&buf[sizeof (be)],
bm->details.rsa_blinded_message.blinded_msg,
tlen);
break;
case GNUNET_CRYPTO_BSA_CS:
GNUNET_memcpy (&buf[sizeof (be)],
&bm->details.cs_blinded_message,
tlen);
break;
default:
GNUNET_assert (0);
}
scratch[0] = buf;
param_values[0] = (void *) buf;
param_lengths[0] = len;
param_formats[0] = 1;
return 1;
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_blinded_planchet (
const struct TALER_BlindedPlanchet *bp)
{
struct GNUNET_PQ_QueryParam res = {
.conv = &qconv_blinded_planchet,
.data = bp,
.num_params = 1
};
return res;
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via #GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_exchange_withdraw_values (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
const struct TALER_ExchangeWithdrawValues *alg_values = data;
const struct GNUNET_CRYPTO_BlindingInputValues *bi =
alg_values->blinding_inputs;
size_t tlen;
size_t len;
uint32_t be[2];
char *buf;
(void) cls;
(void) data_len;
GNUNET_assert (1 == param_length);
GNUNET_assert (scratch_length > 0);
GNUNET_break (NULL == cls);
be[0] = htonl ((uint32_t) bi->cipher);
be[1] = htonl (0x010000); /* magic marker: EWV */
switch (bi->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
tlen = 0;
break;
case GNUNET_CRYPTO_BSA_CS:
tlen = sizeof (struct GNUNET_CRYPTO_CSPublicRPairP);
break;
default:
GNUNET_assert (0);
}
len = tlen + sizeof (be);
buf = GNUNET_malloc (len);
GNUNET_memcpy (buf,
&be,
sizeof (be));
switch (bi->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
break;
case GNUNET_CRYPTO_BSA_CS:
GNUNET_memcpy (&buf[sizeof (be)],
&bi->details.cs_values,
tlen);
break;
default:
GNUNET_assert (0);
}
scratch[0] = buf;
param_values[0] = (void *) buf;
param_lengths[0] = len;
param_formats[0] = 1;
return 1;
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_exchange_withdraw_values (
const struct TALER_ExchangeWithdrawValues *alg_values)
{
struct GNUNET_PQ_QueryParam res = {
.conv = &qconv_exchange_withdraw_values,
.data = alg_values,
.num_params = 1
};
return res;
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument, here a `json_t *`
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_json (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
const json_t *json = data;
char *str;
(void) cls;
(void) data_len;
GNUNET_assert (1 == param_length);
GNUNET_assert (scratch_length > 0);
str = json_dumps (json, JSON_COMPACT);
if (NULL == str)
return -1;
scratch[0] = str;
param_values[0] = (void *) str;
param_lengths[0] = strlen (str);
param_formats[0] = 1;
return 1;
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_json (const json_t *x)
{
struct GNUNET_PQ_QueryParam res = {
.conv = &qconv_json,
.data = x,
.num_params = 1
};
return res;
}
/** ------------------- Array support -----------------------------------**/
/**
* Closure for the array type handlers.
*
* May contain sizes information for the data, given (and handled) by the
* caller.
*/
struct qconv_array_cls
{
/**
* If not null, contains the array of sizes (the size of the array is the
* .size field in the ambient GNUNET_PQ_QueryParam struct). We do not free
* this memory.
*
* If not null, this value has precedence over @a sizes, which MUST be NULL */
const size_t *sizes;
/**
* If @a size and @a c_sizes are NULL, this field defines the same size
* for each element in the array.
*/
size_t same_size;
/**
* If true, the array parameter to the data pointer to the qconv_array is a
* continuous byte array of data, either with @a same_size each or sizes
* provided bytes by @a sizes;
*/
bool continuous;
/**
* Type of the array elements
*/
enum TALER_PQ_ArrayType typ;
/**
* Oid of the array elements
*/
Oid oid;
/**
* db context, needed for OID-lookup of basis-types
*/
struct GNUNET_PQ_Context *db;
};
/**
* Callback to cleanup a qconv_array_cls to be used during
* GNUNET_PQ_cleanup_query_params_closures
*/
static void
qconv_array_cls_cleanup (void *cls)
{
GNUNET_free (cls);
}
/**
* Function called to convert input argument into SQL parameters for arrays
*
* Note: the format for the encoding of arrays for libpq is not very well
* documented. We peeked into various sources (postgresql and libpqtypes) for
* guidance.
*
* @param cls Closure of type struct qconv_array_cls*
* @param data Pointer to first element in the array
* @param data_len Number of _elements_ in array @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via #GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_array (
void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
struct qconv_array_cls *meta = cls;
size_t num = data_len;
size_t total_size;
const size_t *sizes;
bool same_sized;
void *elements = NULL;
bool noerror = true;
/* needed to capture the encoded rsa signatures */
void **buffers = NULL;
size_t *buffer_lengths = NULL;
(void) (param_length);
(void) (scratch_length);
GNUNET_assert (NULL != meta);
GNUNET_assert (num < INT_MAX);
sizes = meta->sizes;
same_sized = (0 != meta->same_size);
#define RETURN_UNLESS(cond) \
do { \
if (! (cond)) \
{ \
GNUNET_break ((cond)); \
noerror = false; \
goto DONE; \
} \
} while (0)
/* Calculate sizes and check bounds */
{
/* num * length-field */
size_t x = sizeof(uint32_t);
size_t y = x * num;
RETURN_UNLESS ((0 == num) || (y / num == x));
/* size of header */
total_size = x = sizeof(struct GNUNET_PQ_ArrayHeader_P);
total_size += y;
RETURN_UNLESS (total_size >= x);
/* sizes of elements */
if (same_sized)
{
x = num * meta->same_size;
RETURN_UNLESS ((0 == num) || (x / num == meta->same_size));
y = total_size;
total_size += x;
RETURN_UNLESS (total_size >= y);
}
else /* sizes are different per element */
{
switch (meta->typ)
{
case TALER_PQ_array_of_blinded_denom_sig:
{
const struct TALER_BlindedDenominationSignature *denom_sigs = data;
size_t len;
buffers = GNUNET_new_array (num, void *);
buffer_lengths = GNUNET_new_array (num, size_t);
for (size_t i = 0; i<num; i++)
{
const struct GNUNET_CRYPTO_BlindedSignature *bs =
denom_sigs[i].blinded_sig;
switch (bs->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
len = GNUNET_CRYPTO_rsa_signature_encode (
bs->details.blinded_rsa_signature,
&buffers[i]);
RETURN_UNLESS (len != 0);
break;
case GNUNET_CRYPTO_BSA_CS:
len = sizeof (bs->details.blinded_cs_answer);
break;
default:
GNUNET_assert (0);
}
/* for the cipher and marker */
len += 2 * sizeof(uint32_t);
buffer_lengths[i] = len;
y = total_size;
total_size += len;
RETURN_UNLESS (total_size >= y);
}
sizes = buffer_lengths;
break;
}
default:
GNUNET_assert (0);
}
}
RETURN_UNLESS (INT_MAX > total_size);
RETURN_UNLESS (0 != total_size);
elements = GNUNET_malloc (total_size);
}
/* Write data */
{
char *out = elements;
struct GNUNET_PQ_ArrayHeader_P h = {
.ndim = htonl (1), /* We only support one-dimensional arrays */
.has_null = htonl (0), /* We do not support NULL entries in arrays */
.lbound = htonl (1), /* Default start index value */
.dim = htonl (num),
.oid = htonl (meta->oid),
};
/* Write header */
GNUNET_memcpy (out,
&h,
sizeof(h));
out += sizeof(h);
/* Write elements */
for (size_t i = 0; i < num; i++)
{
size_t sz = same_sized ? meta->same_size : sizes[i];
*(uint32_t *) out = htonl (sz);
out += sizeof(uint32_t);
switch (meta->typ)
{
case TALER_PQ_array_of_amount:
{
const struct TALER_Amount *amounts = data;
Oid oid_v;
Oid oid_f;
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (meta->db,
"int8",
&oid_v));
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (meta->db,
"int4",
&oid_f));
{
struct TALER_PQ_AmountP am
= TALER_PQ_make_taler_pq_amount_ (
&amounts[i],
oid_v,
oid_f);
GNUNET_memcpy (out,
&am,
sizeof(am));
}
break;
}
case TALER_PQ_array_of_blinded_denom_sig:
{
const struct TALER_BlindedDenominationSignature *denom_sigs = data;
const struct GNUNET_CRYPTO_BlindedSignature *bs =
denom_sigs[i].blinded_sig;
uint32_t be[2];
be[0] = htonl ((uint32_t) bs->cipher);
be[1] = htonl (0x01); /* magic margker: blinded */
GNUNET_memcpy (out,
&be,
sizeof(be));
out += sizeof(be);
sz -= sizeof(be);
switch (bs->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
/* For RSA, 'same_sized' must have been false */
GNUNET_assert (NULL != buffers);
GNUNET_memcpy (out,
buffers[i],
sz);
break;
case GNUNET_CRYPTO_BSA_CS:
GNUNET_memcpy (out,
&bs->details.blinded_cs_answer,
sz);
break;
default:
GNUNET_assert (0);
}
break;
}
case TALER_PQ_array_of_blinded_coin_hash:
{
const struct TALER_BlindedCoinHashP *coin_hs = data;
GNUNET_memcpy (out,
&coin_hs[i],
sizeof(struct TALER_BlindedCoinHashP));
break;
}
case TALER_PQ_array_of_denom_hash:
{
const struct TALER_DenominationHashP *denom_hs = data;
GNUNET_memcpy (out,
&denom_hs[i],
sizeof(struct TALER_DenominationHashP));
break;
}
case TALER_PQ_array_of_hash_code:
{
const struct GNUNET_HashCode *hashes = data;
GNUNET_memcpy (out,
&hashes[i],
sizeof(struct GNUNET_HashCode));
break;
}
default:
{
GNUNET_assert (0);
break;
}
}
out += sz;
}
}
param_values[0] = elements;
param_lengths[0] = total_size;
param_formats[0] = 1;
scratch[0] = elements;
DONE:
if (NULL != buffers)
{
for (size_t i = 0; i<num; i++)
GNUNET_free (buffers[i]);
GNUNET_free (buffers);
}
GNUNET_free (buffer_lengths);
if (noerror)
return 1;
return -1;
}
/**
* Function to generate a typ specific query parameter and corresponding closure
*
* @param num Number of elements in @a elements
* @param continuous If true, @a elements is an continuous array of data
* @param elements Array of @a num elements, either continuous or pointers
* @param sizes Array of @a num sizes, one per element, may be NULL
* @param same_size If not 0, all elements in @a elements have this size
* @param typ Supported internal type of each element in @a elements
* @param oid Oid of the type to be used in Postgres
* @param[in,out] db our database handle for looking up OIDs
* @return Query parameter
*/
static struct GNUNET_PQ_QueryParam
query_param_array_generic (
unsigned int num,
bool continuous,
const void *elements,
const size_t *sizes,
size_t same_size,
enum TALER_PQ_ArrayType typ,
Oid oid,
struct GNUNET_PQ_Context *db)
{
struct qconv_array_cls *meta = GNUNET_new (struct qconv_array_cls);
meta->typ = typ;
meta->oid = oid;
meta->sizes = sizes;
meta->same_size = same_size;
meta->continuous = continuous;
meta->db = db;
struct GNUNET_PQ_QueryParam res = {
.conv = qconv_array,
.conv_cls = meta,
.conv_cls_cleanup = qconv_array_cls_cleanup,
.data = elements,
.size = num,
.num_params = 1,
};
return res;
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_array_blinded_denom_sig (
size_t num,
const struct TALER_BlindedDenominationSignature *denom_sigs,
struct GNUNET_PQ_Context *db)
{
Oid oid;
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db, "bytea", &oid));
return query_param_array_generic (num,
true,
denom_sigs,
NULL,
0,
TALER_PQ_array_of_blinded_denom_sig,
oid,
NULL);
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_array_blinded_coin_hash (
size_t num,
const struct TALER_BlindedCoinHashP *coin_hs,
struct GNUNET_PQ_Context *db)
{
Oid oid;
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db, "bytea", &oid));
return query_param_array_generic (num,
true,
coin_hs,
NULL,
sizeof(struct TALER_BlindedCoinHashP),
TALER_PQ_array_of_blinded_coin_hash,
oid,
NULL);
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_array_denom_hash (
size_t num,
const struct TALER_DenominationHashP *denom_hs,
struct GNUNET_PQ_Context *db)
{
Oid oid;
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db, "bytea", &oid));
return query_param_array_generic (num,
true,
denom_hs,
NULL,
sizeof(struct TALER_DenominationHashP),
TALER_PQ_array_of_denom_hash,
oid,
NULL);
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_array_hash_code (
size_t num,
const struct GNUNET_HashCode *hashes,
struct GNUNET_PQ_Context *db)
{
Oid oid;
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db, "gnunet_hashcode", &oid));
return query_param_array_generic (num,
true,
hashes,
NULL,
sizeof(struct GNUNET_HashCode),
TALER_PQ_array_of_hash_code,
oid,
NULL);
}
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_array_amount (
size_t num,
const struct TALER_Amount *amounts,
struct GNUNET_PQ_Context *db)
{
Oid oid;
GNUNET_assert (GNUNET_OK ==
GNUNET_PQ_get_oid_by_name (db, "taler_amount", &oid));
return query_param_array_generic (
num,
true,
amounts,
NULL,
sizeof(struct TALER_PQ_AmountP),
TALER_PQ_array_of_amount,
oid,
db);
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via #GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_blind_sign_pub (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
const struct GNUNET_CRYPTO_BlindSignPublicKey *public_key = data;
size_t tlen;
size_t len;
uint32_t be;
char *buf;
void *tbuf;
(void) cls;
(void) data_len;
GNUNET_assert (1 == param_length);
GNUNET_assert (scratch_length > 0);
GNUNET_break (NULL == cls);
be = htonl ((uint32_t) public_key->cipher);
switch (public_key->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
tlen = GNUNET_CRYPTO_rsa_public_key_encode (
public_key->details.rsa_public_key,
&tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
tlen = sizeof (public_key->details.cs_public_key);
break;
default:
GNUNET_assert (0);
}
len = tlen + sizeof (be);
buf = GNUNET_malloc (len);
GNUNET_memcpy (buf,
&be,
sizeof (be));
switch (public_key->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
GNUNET_memcpy (&buf[sizeof (be)],
tbuf,
tlen);
GNUNET_free (tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
GNUNET_memcpy (&buf[sizeof (be)],
&public_key->details.cs_public_key,
tlen);
break;
default:
GNUNET_assert (0);
}
scratch[0] = buf;
param_values[0] = (void *) buf;
param_lengths[0] = len;
param_formats[0] = 1;
return 1;
}
/**
* Generate query parameter for a blind sign public key of variable size.
*
* @param public_key pointer to the query parameter to pass
*/
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_blind_sign_pub (
const struct GNUNET_CRYPTO_BlindSignPublicKey *public_key)
{
struct GNUNET_PQ_QueryParam res = {
.conv = &qconv_blind_sign_pub,
.data = public_key,
.num_params = 1
};
return res;
}
/**
* Function called to convert input argument into SQL parameters.
*
* @param cls closure
* @param data pointer to input argument
* @param data_len number of bytes in @a data (if applicable)
* @param[out] param_values SQL data to set
* @param[out] param_lengths SQL length data to set
* @param[out] param_formats SQL format data to set
* @param param_length number of entries available in the @a param_values, @a param_lengths and @a param_formats arrays
* @param[out] scratch buffer for dynamic allocations (to be done via #GNUNET_malloc()
* @param scratch_length number of entries left in @a scratch
* @return -1 on error, number of offsets used in @a scratch otherwise
*/
static int
qconv_blind_sign_priv (void *cls,
const void *data,
size_t data_len,
void *param_values[],
int param_lengths[],
int param_formats[],
unsigned int param_length,
void *scratch[],
unsigned int scratch_length)
{
const struct GNUNET_CRYPTO_BlindSignPrivateKey *private_key = data;
size_t tlen;
size_t len;
uint32_t be;
char *buf;
void *tbuf;
(void) cls;
(void) data_len;
GNUNET_assert (1 == param_length);
GNUNET_assert (scratch_length > 0);
GNUNET_break (NULL == cls);
be = htonl ((uint32_t) private_key->cipher);
switch (private_key->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
tlen = GNUNET_CRYPTO_rsa_private_key_encode (
private_key->details.rsa_private_key,
&tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
tlen = sizeof (private_key->details.cs_private_key);
break;
default:
GNUNET_assert (0);
}
len = tlen + sizeof (be);
buf = GNUNET_malloc (len);
GNUNET_memcpy (buf,
&be,
sizeof (be));
switch (private_key->cipher)
{
case GNUNET_CRYPTO_BSA_RSA:
GNUNET_memcpy (&buf[sizeof (be)],
tbuf,
tlen);
GNUNET_free (tbuf);
break;
case GNUNET_CRYPTO_BSA_CS:
GNUNET_memcpy (&buf[sizeof (be)],
&private_key->details.cs_private_key,
tlen);
break;
default:
GNUNET_assert (0);
}
scratch[0] = buf;
param_values[0] = (void *) buf;
param_lengths[0] = len;
param_formats[0] = 1;
return 1;
}
/**
* Generate query parameter for a blind sign private key of variable size.
*
* @param private_key pointer to the query parameter to pass
*/
struct GNUNET_PQ_QueryParam
TALER_PQ_query_param_blind_sign_priv (
const struct GNUNET_CRYPTO_BlindSignPrivateKey *private_key)
{
struct GNUNET_PQ_QueryParam res = {
.conv = &qconv_blind_sign_priv,
.data = private_key,
.num_params = 1
};
return res;
}
/* end of pq/pq_query_helper.c */
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